<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width,initial-scale=1.0">
    <title ref="maintitle">马兰花创培</title>
  </head>
  <body>
    <div id="app"></div>
    <!-- built files will be auto injected -->
  </body>
  <style>
    .box1{
      display: none;
      box-sizing: content-box;
      width:100px;
      border:20px solid red;
      padding:20px;
      height: 100px;
    }
    .box2{
      display: none;
      box-sizing: border-box;
      border:20px solid red;
      padding:20px;
      width:100px;
      height: 100px;
    }
  </style>
</html>
